I think he needs to be portrayed as he is in the comics, a confident, sometimes arrogent business man that can run the largest company in Marvel, design his own tech, (Bruce Wayne doesn't do that) and date the hottest women on the planet all in the same day.

I agree with the second post. The drinking doesn't come on till much later. We won't care he's a drunk if we don't build him up to see him fall from grace. IMO they should leave that for like the third movie.

Thats very true, hint at it in the first film, show Tony drink a couple drinks, but the audience really needs to connect with Tony and understand why he becomes a alcoholic so they can sympatize with him.

like part 1=level 4 stress-have casual drinks at parties and some sex
part 2=level 7 stress-sit in dark room for a while drinking sadly(like in ultimate avengers)
part 3=level 10 stress-starts letting it **** him up, puts himself and others at risk